<!DOCTYPE html>
<html lang="zh-CN">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>产品月销量</title>
    <style>
        /* CSS 代码 */
        table {
            border-collapse: collapse;
            width: 100%;
            max-width: 800px;
            margin: 0 auto;
            font-family: Arial, sans-serif;
        }
        th, td {
            border: 1px solid #ddd;
            padding: 12px 15px;
            text-align: center;
        }
        th {
            background-color: #f8f8f8;
            font-weight: bold;
        }
        tr:last-child {
            background-color: #e6f2ff;
            font-weight: bold;
        }
    </style>
</head>
<body>
    <h2 style="text-align: center;">产品月销量</h2>
    <table>
        <thead>
            <tr>
                <th>ID</th>
                <th>产品名称</th>
                <th>销量</th>
            </tr>
        </thead>
        <tbody>
            <tr>
                <td>2021090901</td>
                <td>马克杯</td>
                <td>5000</td>
            </tr>
            <tr>
                <td>2021090901</td>
                <td>啤酒杯</td>
                <td>5200</td>
            </tr>
            <tr>
                <td>2021090901</td>
                <td>搪瓷杯</td>
                <td>3500</td>
            </tr>
            <tr>
                <td colspan="2">合计</td>
                <td>13700</td>
            </tr>
        </tbody>
    </table>
</body>
</html>